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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/cdm/renderer/android_key_systems.h"
#include <string>
#include <vector>
#include "base/command_line.h"
#include "base/logging.h"
#include "components/cdm/common/cdm_messages_android.h"
#include "components/cdm/renderer/widevine_key_systems.h"
#include "content/public/renderer/render_thread.h"
#include "media/base/eme_constants.h"
#include "media/base/media_switches.h"
#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
using media::EmeRobustness;
using media::KeySystemInfo;
using media::SupportedCodecs;
namespace cdm {
static SupportedKeySystemResponse QueryKeySystemSupport(
const std::string& key_system) {
SupportedKeySystemRequest request;
SupportedKeySystemResponse response;
request.key_system = key_system;
request.codecs = media::EME_CODEC_ALL;
content::RenderThread::Get()->Send(
new ChromeViewHostMsg_QueryKeySystemSupport(request, &response));
DCHECK(!(response.compositing_codecs & ~media::EME_CODEC_ALL))
<< "unrecognized codec";
DCHECK(!(response.non_compositing_codecs & ~media::EME_CODEC_ALL))
<< "unrecognized codec";
return response;
}
void AddAndroidWidevine(std::vector<KeySystemInfo>* concrete_key_systems,
bool is_non_compositing_supported) {
SupportedKeySystemResponse response = QueryKeySystemSupport(
kWidevineKeySystem);
// When creating the WIDEVINE key system, BrowserCdmFactoryAndroid configures
// the CDM's security level based on a pref. Therefore the supported
// codec/robustenss combinations depend on that pref, represented by
// |bool is_non_compositing_supported|.
// TODO(sandersd): For unprefixed, set the security level based on the
// requested robustness instead of the flag. http://crbug.com/467779
// We should also stop using the term "non_compositing."
SupportedCodecs codecs = response.compositing_codecs;
EmeRobustness max_audio_robustness = EmeRobustness::SW_SECURE_CRYPTO;
EmeRobustness max_video_robustness = EmeRobustness::SW_SECURE_CRYPTO;
if (is_non_compositing_supported) {
codecs = response.non_compositing_codecs;
max_audio_robustness = EmeRobustness::HW_SECURE_CRYPTO;
max_video_robustness = EmeRobustness::HW_SECURE_ALL;
}
// We are using MediaDrm API on Android and we cannot guarantee that API
// doesn't use persistent storage on the device. Therefore always set
// persistent state to EmeFeatureSupport::ALWAYS_ENABLED to err on the
// safe side.
if (codecs != media::EME_CODEC_NONE) {
AddWidevineWithCodecs(
WIDEVINE, codecs, max_audio_robustness, max_video_robustness,
media::EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-license.
media::EmeSessionTypeSupport::
NOT_SUPPORTED, // persistent-release-message.
media::EmeFeatureSupport::ALWAYS_ENABLED, // Persistent state.
media::EmeFeatureSupport::ALWAYS_ENABLED, // Distinctive
// identifier.
concrete_key_systems);
}
// For compatibility with the prefixed API, register a separate L1 key system.
// When creating the WIDEVINE_HR_NON_COMPOSITING key system,
// BrowserCdmFactoryAndroid does not configure the CDM's security level (that
// is, leaves it as L1); therefore only secure codecs are supported.
// TODO(ddorwin): Remove with unprefixed. http://crbug.com/249976
if (response.non_compositing_codecs != media::EME_CODEC_NONE) {
AddWidevineWithCodecs(
WIDEVINE_HR_NON_COMPOSITING, response.non_compositing_codecs,
EmeRobustness::HW_SECURE_CRYPTO, // Max audio robustness.
EmeRobustness::HW_SECURE_ALL, // Max video robustness.
media::EmeSessionTypeSupport::NOT_SUPPORTED, // persistent-license.
media::EmeSessionTypeSupport::
NOT_SUPPORTED, // persistent-release-message.
media::EmeFeatureSupport::ALWAYS_ENABLED, // Persistent state.
media::EmeFeatureSupport::ALWAYS_ENABLED, // Distinctive
// identifier.
concrete_key_systems);
}
}
void AddAndroidPlatformKeySystems(
std::vector<KeySystemInfo>* concrete_key_systems) {
std::vector<std::string> key_system_names;
content::RenderThread::Get()->Send(
new ChromeViewHostMsg_GetPlatformKeySystemNames(&key_system_names));
for (std::vector<std::string>::const_iterator it = key_system_names.begin();
it != key_system_names.end(); ++it) {
SupportedKeySystemResponse response = QueryKeySystemSupport(*it);
if (response.compositing_codecs != media::EME_CODEC_NONE) {
KeySystemInfo info;
info.key_system = *it;
info.supported_codecs = response.compositing_codecs;
// Here we assume that support for a container implies support for the
// associated initialization data type. KeySystems handles validating
// |init_data_type| x |container| pairings.
if (response.compositing_codecs & media::EME_CODEC_WEBM_ALL)
info.supported_init_data_types |= media::kInitDataTypeMaskWebM;
#if defined(USE_PROPRIETARY_CODECS)
if (response.compositing_codecs & media::EME_CODEC_MP4_ALL)
info.supported_init_data_types |= media::kInitDataTypeMaskCenc;
#endif // defined(USE_PROPRIETARY_CODECS)
info.max_audio_robustness = EmeRobustness::EMPTY;
info.max_video_robustness = EmeRobustness::EMPTY;
// Assume the worst case (from a user point of view).
info.persistent_license_support =
media::EmeSessionTypeSupport::NOT_SUPPORTED;
info.persistent_release_message_support =
media::EmeSessionTypeSupport::NOT_SUPPORTED;
info.persistent_state_support = media::EmeFeatureSupport::ALWAYS_ENABLED;
info.distinctive_identifier_support =
media::EmeFeatureSupport::ALWAYS_ENABLED;
concrete_key_systems->push_back(info);
}
}
}
} // namespace cdm
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